I see there are a few of you who have the Mosquito and like it. I have some questions about certain features. #1 Is it only in freedive mode that you have to worry about the ascent rate indicator locking you out if you come up too fast? What about moving your arm too fast to look at your computor or while taking pictures, etc?? #2. Is it adjustable for fresh and salt water? #3. Is it automatically activated upon entering the water or do you have to start it? #4. What is the battery life? Can it easily be switched back and forth between air and nitrox modes during your dive day or do you need your pc or a technician in a dive store to change it? I have not owned a dive computer before, just used rentals by other companies. Are there any little quirks you wish you had known about before buying your Mosquito. In my research it seems to be a pretty good all round air/nitrox computer. I would appreciate all oppinions! Thanks